Sensing properties of different classes of gases based on the nanowire-electrode junction barrier modulation
The role of contact between semiconducting nanowire and metal electrodes in a single nanowire field effect transistor (NW-FET) is investigated for the sensing of different type of gases. Two different types of In2O3 nanowire devices, namely; Schottky contact device (SCD) and Ohmic contact device (OC...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2012
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| Online Access: | https://hdl.handle.net/10356/79981 http://hdl.handle.net/10220/8696 |
| _version_ | 1826118852149248000 |
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| author | Singh, Nandan Yan, Chaoyi Lee, Pooi See Comini, Elisabetta |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Singh, Nandan Yan, Chaoyi Lee, Pooi See Comini, Elisabetta |
| author_sort | Singh, Nandan |
| collection | NTU |
| description | The role of contact between semiconducting nanowire and metal electrodes in a single nanowire field effect transistor (NW-FET) is investigated for the sensing of different type of gases. Two different types of In2O3 nanowire devices, namely; Schottky contact device (SCD) and Ohmic contact device (OCD) are evaluated. SCD has shown a superior response to the reducing gas (CO) compared to oxidizing gas (NO), while OCD has shown high sensitivity towards oxidizing gas (NO) compared to the reducing gas (CO) under similar working conditions. The sensing mechanism is dominated by the contact resistance at the metal-semiconductor junction in SCD and the change in nanowire channel conductance dominates in OCD. The Schottky barrier height (SBH) was extracted using low temperature current voltage measurement which provided direct evidence for the notion that the barrier height plays a crucial role in the sensing of different types of gases. The sensing mechanism is illustrated in this work for both devices. |
| first_indexed | 2024-10-01T04:50:18Z |
| format | Journal Article |
| id | ntu-10356/79981 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:50:18Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | ntu-10356/799812023-07-14T15:46:21Z Sensing properties of different classes of gases based on the nanowire-electrode junction barrier modulation Singh, Nandan Yan, Chaoyi Lee, Pooi See Comini, Elisabetta School of Materials Science & Engineering DRNTU::Science::Chemistry::Analytical chemistry::Gas analysis The role of contact between semiconducting nanowire and metal electrodes in a single nanowire field effect transistor (NW-FET) is investigated for the sensing of different type of gases. Two different types of In2O3 nanowire devices, namely; Schottky contact device (SCD) and Ohmic contact device (OCD) are evaluated. SCD has shown a superior response to the reducing gas (CO) compared to oxidizing gas (NO), while OCD has shown high sensitivity towards oxidizing gas (NO) compared to the reducing gas (CO) under similar working conditions. The sensing mechanism is dominated by the contact resistance at the metal-semiconductor junction in SCD and the change in nanowire channel conductance dominates in OCD. The Schottky barrier height (SBH) was extracted using low temperature current voltage measurement which provided direct evidence for the notion that the barrier height plays a crucial role in the sensing of different types of gases. The sensing mechanism is illustrated in this work for both devices. Accepted version 2012-10-03T06:10:20Z 2019-12-06T13:38:06Z 2012-10-03T06:10:20Z 2019-12-06T13:38:06Z 2011 2011 Journal Article Singh, N., Yan, C., Lee, P. S., & Comini, E. (2011). Sensing properties of different classes of gases based on the nanowire-electrode junction barrier modulation. Nanoscale, 3(4), 1760-1765. https://hdl.handle.net/10356/79981 http://hdl.handle.net/10220/8696 10.1039/c0nr00871k en Nanoscale © 2011 The Royal Society of Chemistry. This is the author created version of a work that has been peer reviewed and accepted for publication by Nanoscale , The Royal Society of Chemistry. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1039/c0nr00871k]. application/pdf |
| spellingShingle | DRNTU::Science::Chemistry::Analytical chemistry::Gas analysis Singh, Nandan Yan, Chaoyi Lee, Pooi See Comini, Elisabetta Sensing properties of different classes of gases based on the nanowire-electrode junction barrier modulation |
| title | Sensing properties of different classes of gases based on the nanowire-electrode junction barrier modulation |
| title_full | Sensing properties of different classes of gases based on the nanowire-electrode junction barrier modulation |
| title_fullStr | Sensing properties of different classes of gases based on the nanowire-electrode junction barrier modulation |
| title_full_unstemmed | Sensing properties of different classes of gases based on the nanowire-electrode junction barrier modulation |
| title_short | Sensing properties of different classes of gases based on the nanowire-electrode junction barrier modulation |
| title_sort | sensing properties of different classes of gases based on the nanowire electrode junction barrier modulation |
| topic | DRNTU::Science::Chemistry::Analytical chemistry::Gas analysis |
| url | https://hdl.handle.net/10356/79981 http://hdl.handle.net/10220/8696 |
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